Rotary pump



(No Model.)

J. N; ESPEGREN. ROTARY PUMP.

No. 571,756. Patented Nov. 24, 1896.

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.lOllN NELSON ESPEGREN, OF OMAHA, NEBRASKA.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 571,756, dated November24:, 1896. Application filed June 1,1895, Serial No. 551,419. (Nomodel.)

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Be it known that 1, JOHN NELSON ESPE- GREN, residing at Omaha, in thecounty of Douglas and State of Nebraska, have invented certain usefulImprovements in Rotary Pumps; and I do hereby declare that the followingis a full, clear, and exact description of the invent-ion, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, which form apart of this specification.

This invention has relation to anew and novel improvement in pumps, andcomprises a pump that may be operated and actuated by hand or by awindenginc or any other suitable motive power.

In the accompanying drawings, Figure 1 shows a central sectional view ofmy pump. Fig. 2 shows a transverse sectional view of the pump takenthrough the valve-housin g, while Fig. 3 shows abroken central sectionalview more clearly illustrating the valveways.

A represents a suitable tube which is permitted to enter the well andextends above the ground a suitable distance, and is provided at theupper end with an escape-spout Secured to the lower end of this pipe Ais an annular seating B, threaded and adapted to receive the lower endof the pipe A, as is shown in Figs. 1 and u. Communicating with thisseating B is an annular housing 0, provided with an upper chamber 5,formed by the bottom of the seating 13, from which extend two similarescape-ways 6 (3, as is shown in Fig. Above and within the chamher 5these escape-ways 13 6 are covered by means of the valves 7 '7, whichare ordinary clack-valves. This annular housing 0 in turn is secured toatubelil, which practically forms valve-housi ng of my device, whichcompartment is provided below with the housing 8, as shown in Fig. 2,and having a central opening adapted to accommodate the circular loweropening 9 of the piston l Secured to this valve-housiug E is a lowerperforated tube 11, which is adapted to be down the well and throughwhich the water is fed to the pump. Transversely extending through thistube H is a brace 17, accommodating a setscrew 16, upon which the lowercircular portion 9 of the piston F rests, as is shown in Fig. 1. Thisvalve portion 9 is provided with openings through which the water isadapted to pass, and to work upward through the hollow piston F, whichis in the form of a cam having its whole length opened at the pointmarked 15, so that the water may enter at l and escape at 15. Positionedwithin the tube E is a second tube G, which is secured to the tube E bymeans of the braces 1O 10. This tubin G is broken at two places andprovided with the valves 12, which are spring actuated by means of thesprings 13 to open inward and work upon the piston F. By means of thetubes E and G a large annular space K is formed, within which the wateris collected and is permitted to escape by means of the waysG 6 into thechamber 5, and from thence is forced upward through the tube A. Securedto the piston F is an operating-rod 3, which is provided above with thecrank 4, which may be in connection with a wind-err gine or any othersuitable motive power, and by means of which the valve is operated.

\Vhen all of the instruinentalities have been properly arranged, theoperation of my device would be as follows: The water would enter thelower perforated tubing H and en ter through the opening 1 to fill thepiston F. Now by virtue of the springs 13 the valves 12 are alwaysopened and are only closed with the projecting portion of the campistonF, which when rotated comes in contact with the same to close saidvalves. The water in filling the piston F is by virtue of the rotationof the piston F forced into the chamber K, and finding no outlet isforced up through the ways 6 6 into the chamber 5, where it is notpermitted to escape by virtue of the valves '7, the escape being at thenozzle 2. The water of course flows out of the valve as it rotates insuch a way that it escapes at the rear and is forced by means of theforward portion of the cam-valve into the chamber K.

The device is easily operated and adjustable. The water is elevated bybeing forced out of the compartment 8 into the compartment K, into whichit is suddenly forced with considerable power, so that the valves 7 arecarried upward, permitting the ingress of water into the chamber 5. Thevalves 12 are forced by the cam F, which gradually en counters thesevalves and decreases the capacity of the chambers 8, so that the wateris by force carried into the chamber K. The back of the cam ridesagainst these valves 12, the supply of water entering through thishollow cam and out of the opening 15.

Now, having thus described my said invention, what I claim as new, anddesire to secure by United States Letters Patent, is

1. I11 a pump, the combination with a hollow cam-shaped rotary pistonhaving an opening, a lower projection extending from said piston andprovided with suitable opening permitting the ingress of the water; ahousing adapted to receive said piston, said housing being in two partsand provided with valves; a superposed chamber in communication withsaid valve-housin g; a supply-pipe extending from said superposedchamber, all substantially as and for the purpose set forth.

2. In arotary pump, the combination, with the housing E, of thesectional tube, G, the valves, 12, 12, forming part of said tubing, G,the springs, 13, 13, the piston, F, provided with the opening, 15, andthe lower projection, 9, said projection being provided with an opening,1, the annular housing, 0, provided with the escape-ways, 6, 6,coinmiinieating with said valved chamber, the valves 7, 7, within saidannular housing, and the conducting-tube, A, all arranged substantiallyas and for the purpose set forth.

3. In a rotary pump the combination of a housing embodyingsuperposedchambers, the lower chambers being divided into an inner andoutercompartment, a discharge-pipe extending from the upper chamber, awaterinlet openinginto said inner compartment, a hollow rotary pistonwithin said inner compartment, said piston being provided with an inletextendin beyond said lower chamber, and an opening extending into saidinner compartment, valves communicating with said outer andinnercompartments, said outer compartment communicating with said upperchamber, said valves being actuated by said rotary piston, and a valvecontrolling the communication between said outer coinpartment and upperchamber, all substantially as and for the purpose set forth.

4. In a pump the combination of a housing embodying superposed chambers,the lower chamber being divided into an outer and an open-ended innercompartment, a dischargeopening within said upper chamber, a pistonwithin said inner compartment, said piston being provided with anunvalved water-inlet opening into said inner compartment,avalvecontrolled communication between said upper chamber and outercompartment, tior nially open valves between said outer and innercompartments, said valves being closed by said piston, all substantiallyas and for the purpose set forth.

5. In a pump the combination of a housing embodying adjoining chambers,one of said chambers being divided into an inner and an outercompartment, valve connection between said inner and outer compartmentand an escape-opening extending from said undivided chamber, awater-inlet extending into said inner compartment, a communicating valvenormally open between said inner and outer compartments and a pistonadapted to operate said valve, all substantially as and for the purposeset forth.

(3. In a pump the combination of a housing embodying adjoining chambers,one of said chambers being divided into an outer and an open-ended innercompartment, a dischargeopening within said undivided chamber. a pistonwithin said inner compartment. said piston being provided with anunvalved vater-inlet,a v'alve communicating between said inner and outercompartment, said valve being actuated by said piston, all substantiallyas and for the purpose set forth.

7. In a pump the combination of the following instruinentalities, towit: a cylindrical chamber divided into an inner cylindrical and anouter annular compartment, a section of the dividing-wall between saidcompartments being hinged, a spring to normally force said sectioninward, an exitopening from said outer chamber, a circular opening inthe bottom of said inner compartment,- a hollow scroll-shaped pistonwithin said inner chamber, one point of said piston normally worm ingagainst said dividing-wall and having an open lower projection passingthrough said circular opening, exit'openings from said piston, and abearing to adjustablysupport said piston, substantially as shown.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN NELSON ESPEGREX.

\Vitnesses ELMER G. STARR, G. W. Sons.

